Development of radiation hardened diamond image sensing devices (Contract research); FY2020 Nuclear Energy Science & Technology and Human Resource Development Project

Collaborative Laboratories for Advanced Decommissioning Science; National Institute of Advanced Industrial Science and Technology*

JAEA-Review 2021-026, 47 Pages, 2021/11

JAEA-Review-2021-026.pdf:2.16MB

The Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency (JAEA), had been conducting the Nuclear Energy Science & Technology and Human Resource Development Project (hereafter referred to "the Project") in FY2020. The Project aims to contribute to solving problems in the nuclear energy field represented by the decommissioning of the Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company Holdings, Inc. (TEPCO). For this purpose, intelligence was collected from all over the world, and basic research and human resource development were promoted by closely integrating/collaborating knowledge and experiences in various fields beyond the barrier of conventional organizations and research fields. The sponsor of the Project was moved from the Ministry of Education, Culture, Sports, Science and Technology to JAEA since the newly adopted proposals in FY2018. On this occasion, JAEA constructed a new research system where JAEA-academia collaboration is reinforced and medium-to-long term research/development and human resource development contributing to the decommissioning are stably and consecutively implemented. Among the adopted proposals in FY2019, this report summarizes the research results of the "Development of radiation hardened diamond image sensing devices" conducted in FY2020. The research objective of this project is to develop image sensing devices which work under the high radiation condition. The devices will be realized using radiation hardened diamond semiconductor devices as charge transfer devices and photodetectors. The research project has mainly two targets such as to confirm charge coupled devices operation on diamond unipolar devices and to characterize photo conductivity of diamond detectors.

Equilibrium and non-equilibrium charge-state distributions of 2.0 MeV/u carbon ions passing through carbon foils

Imai, Makoto*; Sataka, Masao*; Matsuda, Makoto; Okayasu, Satoru; Kawatsura, Kiyoshi*; Takahiro, Katsumi*; Komaki, Kenichiro*; Shibata, Hiromi*; Nishio, Katsuhisa

Nuclear Instruments and Methods in Physics Research B, 354, p.172 - 176, 2015/07

https://doi.org/10.1016/j.nimb.2014.12.045

Both equilibrium and non-equilibrium charge-state distributions were studied experimentally for 2.0 MeV/u carbon ions after passing through carbon foils. Measured charge-state distribution established the equilibrium at a target thickness of 10 g/cm and this remained unchanged until a maximum target thickness of 98 g/cm. The equilibrium charge-state distribution, the equilibrium mean charge-state, and the width and skewness of the equilibrium distribution were compared with predictions using existing semi-empirical formulae as well as simulation results, including the ETACHA code. It was found that charge-state distributions, mean charge states, and distribution widths for C, C, and C incident ions merged into quasi-equilibrium values at a target thickness of 5.7 g/cm in the pre-equilibrium region and evolved simultaneously to the "real equilibrium" values for all of the initial charge states, including C and C ions. Two kinds of simulation, ETACHA and solution of rate equations taking only single electron transfers into account, were used, and both of them reproduced the measured charge evolution qualitatively. The quasi-equilibrium behavior could be reproduced with the ETACHA code, but not with solution of elementary rate equations.

Manufacture of high-speed neutral atomic and molecular beam apparatus and its characterization

Hachiue, Shunsuke; Teraoka, Yuden

JAERI-Tech 2004-066, 69 Pages, 2004/11

JAERI-Tech-2004-066.pdf:7.44MB

In order to progress chemical reaction studies at verious material surfaces using high speed and reactive ions and neutral particles beams, a high-speed neutral atomic and molecular beam apparatus has been developed. In this report, details of the apparatus and characteristics of actually-generated oxygen atomic and molecular ion/neutral beams are discribed. This apparatus is a ultra-high vacuum system consisting of a plasma ion source, electrostatic lens systems, a mass separator, and a charge transfer chamber. Total oxygen ion currents of 52 microamps at accerelation energy of 8 keV and 17 microamps even at 20 eV were obtained. Mass separation was also good so that an oxygen molecular ion beam of 11 microamps and an oxygen atomic ion beam of 5.5 microamps were obtained even at 20 eV. A neutral oxygen atomic or molecular beam was also generated with the flux density of 10 particles/cm/s.

The Resonance raman effect of dicaesium uranyl tetrachloride in dimethyl sulfoxide

Soga, Takeshi

Spectrochimica Acta, Part A, 57(9), p.1767 - 1780, 2001/08

no abstracts in English

Dosimetry systems for 5-20MeV/amu heavy charged particle beams

Kojima, Takuji; Sunaga, Hiromi; Takizawa, Haruki; Tachibana, Hiroyuki

IAEA-TECDOC-1070, p.197 - 202, 1999/03

no abstracts in English

Recommended cross sections for state-selective electron capture in collisions of C and O ions with atomic hydrogen

R.K.Janev*; R.A.Phaneuf*; *; Shirai, Toshizo

Atomic Data and Nuclear Data Tables, 55, p.201 - 232, 1993/00

https://doi.org/10.1006/adnd.1993.1021

no abstracts in English

Partial Cross Sections for Charge Transfer in Collisions of Multicharged Ions with Atomic Hydrogen

Ryufuku, Hiroshi

JAERI-M 82-031, 127 Pages, 1982/04

JAERI-M-82-031.pdf:1.56MB

no abstracts in English

Oscillatory behavior of charge transfer cross sections as a function of the charge of projectiles in low-energy collisions

Ryufuku, Hiroshi; ; *

Phys.Rev.,A, 21(3), p.745 - 750, 1980/00

no abstracts in English

The Systematic investigation for the total cross section of charge transfer in collision of atomic hydrogen with bare nuclear ions

Ryufuku, Hiroshi;

Atomic Collision Research in Japan, Progress Report, p.41 - 45, 1979/00

no abstracts in English

Charge transfer cross sections for collisions of Li-,Be-,B-,and C- ions with atomic hydrogen

Ryufuku, Hiroshi;

Phys.Rev.,A, 19(4), p.1538 - 1549, 1979/00

no abstracts in English